洪屏抽水蓄能电站现场甩负荷试验及数值反演分析

Field load rejection test and numerical inversion analysis of Hongping Pumped Storage Power Station

抽水蓄能电站过渡过程的准确预测是电站设计及运行的重要问题。通过建立洪屏抽水蓄能电站引水发电系统过渡过程数值模型,模拟了电站现场甩负荷试验工况,并与实测数据进行了对比验证,得到了数值仿真与实测数据的误差。基于该模型,计算了电站可能出现的危险过渡过程工况,并根据试验以及多个机组厂家的误差经验公式,对计算结果进行了修正。结果表明:实测数据与数值仿真数据基本一致,但实际压力包含了压力脉动使得数值模拟结果偏危险,需通过试验或经验公式进行修正。该抽蓄电站的过渡过程控制参数考虑误差和压力脉动后,均未超过设计值,保障了电站的安全。现场试验及反演分析成果可为类似电站的设计及运行提供参考。

Accurate prediction of the transition process of pumped storage power station is an important problem in its design and operation.In this paper,the load rejection test condition of Hongping Power Station is simulated by establishing a numerical model of the transition process of the diversion system of the storage power station.The simulation results are verified by comparing with the measured data,and the error between the numerical simulation and the measured data is obtained.Based on the model,the extreme transition conditions of power station are simulated,and the calculated results are modified according to the experimental results and the error empirical formulas of several unit manufacturers.The results show that the measured data are basically consistent with the numerical simulation data,but the actual pressure contains pressure pulsation making the numerical simulation results dangerous,which needs to be corrected by experiment or empirical formula.After considering the error and pressure pulsation,the transition process control parameters of this pumping storage power station do not exceed the design value,which ensures the safety of the power station.The results of field test and inversion analysis can provide reference for the design and operation of similar power stations.